Update audiocraft_docs.yml

Update audiocraft_docs to checkout@v3

.github/workflows/audiocraft_docs.yml

@@ -8,7 +8,7 @@ jobs:
     name: Run docs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: ./.github/actions/audiocraft_build
       - name: Config git
         run: |